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*#0011# – : Provides live diagnostic telemetry for your network environment. It reveals real-time signal strength (RSRP/RSRQ), active band numbers (e.g., LTE Band 3, Band 20), and cell tower identification numbers.

Turn off Wi-Fi Calling and VoLTE temporarily. Some carriers redirect USSD codes through their servers, breaking local secret codes.

By using these secret codes responsibly, you can take full control of your Samsung Galaxy A7 how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

Here are the most useful codes verified to work on Samsung devices running the Android versions typically associated with the Galaxy A7 series.

Alter low-level settings regarding USB connections, dump system logs, or view firmware variables. *#0011# – : Provides live diagnostic telemetry for

Launch the stock, pre-installed Samsung Phone app. Third-party dialers downloaded from the Google Play Store often lack the system permissions required to trigger USSD codes.

These are the most common and useful codes for testing hardware functionality on your Samsung A7. Some carriers redirect USSD codes through their servers,

These codes allow you to access hidden diagnostic menus and hardware information.

: Some codes may not work depending on your mobile carrier, as some providers disable certain diagnostic menus. Other Hidden Features

Accesses the firmware menu for Wi-Fi and the touch screen panel ( TSP ). You can use this to refresh Wi-Fi versions or update touch firmware.

: Tests the physical sensors of your camera arrays outside the camera app.